April 17, 2016 10:35 AM

Jeffrey Mayer/WireImage

A baby Legend is born!

Model, TV host and newly-minted cookbook author Chrissy Teigen and her husband, musician John Legend, welcomed their first child on Thursday, April 14, they announced via social media Sunday.

“She’s here! Luna Simone Stephens, we are so in love with you! And sleepy. Very sleepy,” Teigen wrote alongside a snapshot of the baby’s weight — 6 lbs., 11 oz. — dated Thursday.

Legend also tweeted the happy news on Sunday, writing, “Our new love is here! Luna Simone Stephens, born on Thursday, the 14th. We couldn’t be happier!”

Teigen, 30, shared her pregnancy news on Instagram in October after revealing that she was undergoing IVF in order to conceive.

In February, she told PEOPLE exclusively that she chose a female embryo during the process, though they didn’t reveal the sex publicly until December.

“I’ve made this decision,” Teigen said. “Not only am I having a girl, but I picked the girl from her little embryo. I picked her and was like, ‘Let’s put in the girl.’ “

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For the couple, who married in 2013, their daughter will hopefully be the first of many. “The number of embryos we have left is not matching the number of people I want at my dinner table, so I’ll have to do it again,” Teigen told PEOPLE.

“I wish I had frozen my eggs earlier. We have a few more on ice. Who knows what will work?”

Anders Overgaard

Even though Teigen had “never been alone with a kid” before motherhood, she and Legend are preparing as best they can.

“We’ve been together so long, and sometimes we look at each other and we’re like, ‘I know everything about you and you know everything about me,’ ” Teigen said. “But we have no idea what we’re going to be like as parents. I think it’ll be really fun. I’m excited.”

— Catherine Kast

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